It may sound blindingly obvious, but she’s not going to want to be taped by some Neanderthal sex monkey just wanting to consume tits and ass in no particular order. She needs to know why you want a permanent record of her and exclusively her.

Think of something specific you like about her body and hint that you wish you had a record of it, the less obvious the compliment the better. That’s not to say you should harp on about her kneecaps, but you might admire a particular patch of freckles or dimples on a sexy bit of her. This will make your eventual suggestion to film each other seem a bit less out of the blue.